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Fred Hebard wrote:
> On Jan 2, 2008, at 2:07 PM, Lu Abel wrote:
>
>
>>
>> Greg R. wrote:
>>
>>> --- frankreed{at}HistoricalAtlas.net wrote:
>>>
>>>
>>>
>>>> What do you think he's talking about?
>>>>
>>>>
>>> Obviously someone who hasn't had a major electrical/electronics
>>> failure
>>> while out on the open ocean... ;-)
>>>
>>>
>> Would that include my quartz crystal controlled watch?
>>
>> I truly believe in the adage that a good navigator has two or more
>> sources of positional information available. And only a fool
>> would go
>> offshore with a single GPS set, even if it were integrated into the
>> fanciest electronic charting system.
>>
>> But I can't figure out why the "can't trust electronics, gotta use
>> celestial" crowd seems perfectly happy with electronic chronometers
>> (synchronized, of course, by listening to WWV or BBC), and perhaps
>> even
>> reducing their sights using a calculator. Those electronics are
>> subject to exactly the same failure modes as GPS sets.
>>
>
> The answer leads us back to the subject: lunars. Of course you have
> to trust the Nautical Almanac, but....
>
> Fred Hebard
>
Which is generated using *electronic* computers. Darn, where are
those 19th century logarithm tables when we need them!! :-P
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